Dataset

Head of “airquality”

## Warning: package 'ggplot2' was built under R version 3.4.4
##   Ozone Solar.R Wind Temp Month Day
## 1    41     190  7.4   67     5   1
## 2    36     118  8.0   72     5   2
## 3    12     149 12.6   74     5   3
## 4    18     313 11.5   62     5   4
## 5    NA      NA 14.3   56     5   5
## 6    28      NA 14.9   66     5   6

Simple plot

Temperature vs. ozone (the color represents the month)

Plot with sizes

Temperature vs. ozone (the color represents the month and the size represents solar.r)